Data Transformation Engine Design Studio Tutorial
Chapter 3 - Modifying the Mail.mms Map Source File  Entering Map Rules 
Design Studio Tutorial 
96 
3  Select the IF function in the Functions list. 
Tip  Placing current focus in the Functions list and typing the letter I jumps directly 
to the I functions. 
4  Click Insert. 
=IF( ) appears in the Rule Bar. The cursor is positioned between the 
parentheses, ready for the first argument of the function. 
5  Click Close to close the Insert Function dialog box. 
6  To make the rule easier to read, enter a few spaces after the opening 
parenthesis 
(. 
7  Insert the PRESENT function and close the Insert Function dialog box. 
=IF( PRESENT( ) ) appears in the Rule Bar. The cursor is positioned 
between the parentheses, ready for the first argument of the 
PRESENT 
function. 
8  To improve readability, type a few spaces next to the PRESENT function, before 
the opening parenthesis 
(. 
9  Drag the Middle Name Field from the ContactsIn input card into the Rule 
Bar, between the parentheses of the 
PRESENT function. 










